title: Periapical surgery of molars.
mesh_terms: D001047:Apicoectomy; D003723:Dental Amalgam; D005069:Evaluation Studies as Topic; D006801:Humans; D008963:Molar / Q000601:surgery*; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials
chemical_list: D012387:Root Canal Filling Materials; D003723:Dental Amalgam